English 中文網(wǎng) 漫畫網(wǎng) 愛新聞iNews 翻譯論壇
    中國(guó)網(wǎng)站品牌欄目(頻道)
    當(dāng)前位置: Language Tips > Special Speed News VOA慢速

    Steps toward drought-resistant crops, 'designer' rice

    [ 2012-01-18 12:34]     字號(hào) [] [] []  
    免費(fèi)訂閱30天China Daily雙語新聞手機(jī)報(bào):移動(dòng)用戶編輯短信CD至106580009009

    This is the VOA Special English Agriculture Report.

    A discovery in a laboratory could help lead to new generation of drought-resistant crops. Drought conditions cause plants to produce a stress hormone called abscisic acid. This chemical activates a set of protein molecules calledreceptors. These receptors then activate a series of changes to help the plant survive.

    The natural reaction of the receptors is to close so-called guard cells on and inside the leaves. That closure decreases water loss and stops the plant from growing to save water during a drought.

    Researchers say they have discovered a way to "supercharge," or increase, this reaction. Sean Cutler at the University of California, Riverside, led the team. The scientists engineered abscisic acid receptors that can be turned on at will and stay on. They tested hundreds of versions of engineered receptor genes until they found ones that worked right together.

    The team worked with Arabidopsis, a plant often used in experiments. The results recently appeared in the Proceedings of the National Academy of Sciences.

    Professor Cutler says testing the new receptors in the field may take several years. He also points out that drought is not the only cause of plant stress.

    SEAN CUTLER: "If a plant grows in the deserts normally, like a cactus, what would be stressful for a crop plant is not stressful for a cactus because it has evolved to live in that ecological niche where the water is very rare. So it would really mean, you know, any significant deviation from the normal or ideal growth conditions for an organism."

    In another development, scientists have produced a new system for analyzing genetic markers in rice plants. A genetic marker is a DNA sequence with a known location. It can help scientists identify nearby genes linked to individual qualities, or traits.

    Anna McClung and Georgia Eizenga are genetic scientists with the United States Department of Agriculture. Their new system will let researchers genetically "fingerprint" rice varieties and gain a better understanding of the markers.

    Until now, breeders have been limited to using perhaps 200 markers. But modern technology lets scientists identify differences throughout the plant's genome, its genetic map. Ms McClung says that means the ability to identify new genes that control biological pathways.

    ANNA McCLUNG: "You know, biological pathways in the plant that may control yield, disease resistance, nutritional quality ... "

    The finding could make it easier in the future for farmers to grow "designer rice," rice bred to meet their specific needs.

    And that's the VOA Special English Agriculture Report, written by Jerilyn Watson. I'm Karen Leggett.

    abscisic: 脫落酸

    receptors: (細(xì)胞的)受體

    cactus: 仙人掌

    Related Stories:

    As drought intensifies, Kenya fears famine

    Some crops can help farmers prepare for disasters

    Drought-resistant seeds to help growers

    Researchers seek drought-resistant crops

    (來源:VOA 編輯:Rosy)

     
    中國(guó)日?qǐng)?bào)網(wǎng)英語點(diǎn)津版權(quán)說明:凡注明來源為“中國(guó)日?qǐng)?bào)網(wǎng)英語點(diǎn)津:XXX(署名)”的原創(chuàng)作品,除與中國(guó)日?qǐng)?bào)網(wǎng)簽署英語點(diǎn)津內(nèi)容授權(quán)協(xié)議的網(wǎng)站外,其他任何網(wǎng)站或單位未經(jīng)允許不得非法盜鏈、轉(zhuǎn)載和使用,違者必究。如需使用,請(qǐng)與010-84883631聯(lián)系;凡本網(wǎng)注明“來源:XXX(非英語點(diǎn)津)”的作品,均轉(zhuǎn)載自其它媒體,目的在于傳播更多信息,其他媒體如需轉(zhuǎn)載,請(qǐng)與稿件來源方聯(lián)系,如產(chǎn)生任何問題與本網(wǎng)無關(guān);本網(wǎng)所發(fā)布的歌曲、電影片段,版權(quán)歸原作者所有,僅供學(xué)習(xí)與研究,如果侵權(quán),請(qǐng)?zhí)峁┌鏅?quán)證明,以便盡快刪除。
     

    關(guān)注和訂閱

    人氣排行

    翻譯服務(wù)

    中國(guó)日?qǐng)?bào)網(wǎng)翻譯工作室

    我們提供:媒體、文化、財(cái)經(jīng)法律等專業(yè)領(lǐng)域的中英互譯服務(wù)
    電話:010-84883468
    郵件:translate@chinadaily.com.cn
     
     
    精品欧洲av无码一区二区| 日韩亚洲不卡在线视频中文字幕在线观看| 成年无码av片在线| 中文无码字慕在线观看| 亚洲gv天堂无码男同在线观看| 亚洲日韩精品一区二区三区无码| 中文无码一区二区不卡αv| 无码aⅴ精品一区二区三区浪潮| 人妻精品久久久久中文字幕| 无码av中文一二三区| 乱色精品无码一区二区国产盗| 亚洲天堂2017无码中文| 午夜视频在线观看www中文| 亚洲精品无码日韩国产不卡?V| 久久精品aⅴ无码中文字字幕重口| 婷婷四虎东京热无码群交双飞视频| 高清无码v视频日本www| 爆操夜夜操天天操狠操中文| 亚洲无码日韩精品第一页| 黑人无码精品又粗又大又长| 久久久久亚洲精品无码蜜桃| 亚洲av无码国产精品夜色午夜| 国产成人无码AV一区二区在线观看| 中文字幕亚洲精品| 亚洲AV无码专区在线播放中文| 婷婷色中文字幕综合在线| 无码日韩人妻AV一区二区三区| 2024最新热播日韩无码| 国产乱子伦精品无码码专区 | 国产精品无码素人福利不卡| 日韩人妻无码一区二区三区99| 亚洲V无码一区二区三区四区观看| 国产aⅴ无码专区亚洲av麻豆| 亚洲一区日韩高清中文字幕亚洲| 欧美日韩中文字幕久久久不卡| 中文字幕在线免费| 日韩视频中文字幕精品偷拍| 最近的2019免费中文字幕| 亚洲日韩国产AV无码无码精品| 亚洲V无码一区二区三区四区观看 亚洲爆乳精品无码一区二区三区 亚洲爆乳无码一区二区三区 | 岛国无码av不卡一区二区|